Clamp



F. HAVCHMANN.

CLAMP.

APPLICATION HLED MAR.15,1920. RENEwED MAY11.1921.

1,391,828, Pauaspt. 27, 1921.

. Zg/ l d?" f.-

, UNITED STATES PATENT OFFICE..

FREDERICK IIAGHMANN, or Sr. LoUIS, MISSOURI, ASSIGNOR rro WILLIAM II."GEEGG,

TRUSTEE, or sfr. LoUIs, MISSOURI.

CLAMP.

l Specification of Letters Patent. Patnted Sept 27 11921.

Application led March 15, 1920, Serial No. 365,938. Renewed May 11,1921. Serial No. 468,728.

To all whom 'it may concern j, y

Be it known that I, FREDERICK HACH- MANN, a citizen of the United Statesyof America, av resident of the city of St. Louis, in the FtateV ofMissouri, have inventedY certain new and useful Improvements 1n Clamps,of which the following is a full, clear, and exact description,reference being had to the accompanying drawings, forming a part of thisspecification. y

This invention relates to improvements In clamps, one of the objectsbeing to produce a strong and simple clamp having a firmthrust-receiving bearing v,for a clamping screw. More specificallystated, the preferred form of vthe invention comprises a novelcombination of elements whereby a simple thrust-receiving member issecurely anchored in a yoke, to which the stresses are transmitted fromthe clamping screw. This thrust-receiving member is preferably a tubethreaded to receive the clamping screw and preferably interlocked withthe yoke, so as to effectively withstand the stresses to which it issubjected.

Figure I is a side eleva-tion, partly in section, illustrating a clampembodying the features of this invention.

Fig. II is a front elevation of the clamp.

Fig. III is a vertical Section illustrating the thrust-receiving sleeveanchored in the oke. y Fig. IV is a horizontal section takenapproximately on the line IIT-IV, Fig. III, the pro'ections at the lowerend of the sleeve being sliown in elevation.

Fig. V is a section on line V-V, Fig. III;

To illustrate the invention, I have shown a yoke comprising oppositelydisposed thrust arms A and B, and a connecting member C uniting saidarms. The elements oi this yoke include a continuous web having ahorizontal upper member 1, a horizontal lower member 2 and a verticalmember 3. Flanges 4 extend from the side margins of the continuous web,said flanges being combined withthe web to form a continuous yoke,channel shaped in cross section.

At the end of thrust arm A, the web 2 is extended and turned downwardlyand backwardly between the lianges 4, as indicated at 2LL and 2b, thedownturned member 2a being between end margins of the flanges 4 and thelmember 2b being between the lower margms of said flanges. Apertures 5are formed In said lower margins, and the webr member 2b is providedwith lateral projections 6 which extend into said apertures. Theextended end portion 2b of the web is thus interlocked with and securelyanchored in the flanges 4.

-A threaded thrust-receiving sleeve D is arranged between the iiangesy 4of the lower arm A and also between the horizontal web- 2 and the endportion of its extension 2b. The bottom face of theV sleeve or tube D isseated upon the end portion 2b of the web, while the upper portion ofsaid sleeve` is seated in a circular opening in the web2. The upper endof thrust-receiving sleeve D is turned outwardly to form a ange 7 seatedupon the faceof the web member 2. At its lower end, the sleeve D isprovided with lateral projections 8 extending into the apertures 5 andseated upon the projections 6 ofthe web member 2b.

The yoke is preferably made of thin pressed metal, and thesleeve D isinserted into arm A while itsilanges 4 are separated a distance greatenough to receive the projections 6 and 8. Thereafter, these flanges 4are forced toward each other for the purpose of locating the projections6 and 8 in the apertures 5.

9 designates a clamping screw mounted in the threaded sleeve D andhaving a head 10 at its lower end and a seat 11 at its upper end. Whenthe clamp is in service, the screw 9 is tightened and the sleeve D issubjected to a thrust in a downward direction from the position shown byFigs. I and III. Owing to the manner in which the sleeve D is combinedwith other elements of the clamp, the thrusts tending to displace thesleeve are firmly opposed by the anchored web member 2b on which thebottom of the sleeve is seated, and also by the flanges 4 Awith whichthe sleeve projections 8 are setions 2, and 2b, which cooperate with web2 and flanges t to form a housing for the thrust-receiving sleeve.

I claim:

l. A clamp comprising a yoke havingl oppositely disposedthrust-receiving arms, one

of said arms being in the form of a channel having a web and marginalflanges extending therefrom, a threaded thrust-receiving tube betweensaid flanges, said web having an extended end portion turned downwardlyand backwardly to form a seat for one end of said thrust-receiving tube,and a clampf ing screw mounted in said thrust-receiving tube.

2. A clamp comprising a yoke having oppositely disposed thrust-receivingarms, one of said arms .being in the form of a channel having a web andmarginal flanges extending therefrom, a threaded thrust-receiving tubearranged between said flanges and having its upper portion seated insaid web, said web being extended downwardly and backwardly between saidflanges to form a seat for the lower end of said tube, the extendedportion of said web being interlocked with and secured to said flanges,and a clamping screw mounted in said thrust-receiving tube.

3. A clamp comprising a yoke having oppositely disposed thrust-receivingarms, said yoke consisting of ai web and side flanges extendingtherefrom to form a channel lshape in cross section, said web having anextended portion turned downwardly and backwardly between the marginsof' the flanges at the outer end of one of said arms, said flanges beingprovided with apertures and the end of said extended portion of the webbeing provided with lateral projections anchored in lsaid apertures, athreaded sleeve arranged'between the apertured flanges and having itsupper end turned outwardly and seated on the face of the web, the lowerend of said sleeve. being seated on the extended end portion of said weband provided with lateral projections anchored in said apen tures, and a'clamping screw mounted in said threaded sleeve.

Intestimony that I claim the foregoing I hereunto affix my signature,

FREDERICK HACHMANN.

